US8353217B2 - Test machine to apply a uniform internal pressure to a tube - Google Patents

Test machine to apply a uniform internal pressure to a tube Download PDF

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Publication number
US8353217B2
US8353217B2 US12/993,921 US99392109A US8353217B2 US 8353217 B2 US8353217 B2 US 8353217B2 US 99392109 A US99392109 A US 99392109A US 8353217 B2 US8353217 B2 US 8353217B2
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United States
Prior art keywords
tube
flanges
test machine
ribs
bladder
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Expired - Fee Related, expires
Application number
US12/993,921
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English (en)
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US20110259087A1 (en
Inventor
Pierre Rigaud
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Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Assigned to COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES reassignment COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RIGAUD, PIERRE
Publication of US20110259087A1 publication Critical patent/US20110259087A1/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G01N3/12—Pressure testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
    • G01N2203/0071—Creep
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/026—Specifications of the specimen
    • G01N2203/0262—Shape of the specimen
    • G01N2203/0274—Tubular or ring-shaped specimens

Definitions

  • the application of this invention is a test machine designed to apply a uniform internal pressure to a tube in order to perform tests to study a rupture, damage without rupture or creep.
  • test methods already exist. One of them can be done with a tensile testing machine. Two parts with a half-disk cross section are placed in the tube at diametrically opposite positions and at a spacing from each other controlled by the machine. Since the rounding of the test parts is identical to the rounding of the tube, they bear on the entire internal face of the tube over their entire width and apply internal pressure due to their contact. This approach is convenient but it has the disadvantage that the pressure resulting from opposing separation forces is not uniform over the circumference of the tube; part of the tube located between them is not subject to any internal pressure and in practice is subject to a bending component in addition to the tension. This introduces an uncertainty on the results and complicates their interpretation. Furthermore, these tests were carried out with small tube heights of the order of only 15 mm, which cannot be representative.
  • the main objective of the invention was to propose a test method giving precise results by eliminating the end effect and real and complete uniformity of the pressure applied on the tube. An attempt was made to perform this test with a tensile and compression testing machine. We also attempted to make a simple device, enabling fast assemblies and disassemblies to perform tests with large series of samples.
  • the invention is a test machine to apply a uniform internal pressure to a tube, comprising a body, a piston sliding in the body and varying a volume of a liner machined in the body, an annular elastic bladder surrounding a periphery of the body, the periphery of the body comprising two circular ribs and a recess separating the ribs and communicating with the liner, the machine also comprising two flanges fixed to the body at two opposite ends and comprising annular mating flanges that surround the ribs, the bladder being clamped at each of the two opposite ends between one of the ribs and one of the mating flanges.
  • FIG. 1 shows a sectional view of the device
  • FIG. 2 shows a manufacturing detail
  • the device according to the invention comprises a central cylindrical body 1 , inside which a liner 2 that is also cylindrical is machined.
  • a piston 3 slides in the body 1 so as to vary the internal volume of the liner 2 .
  • seals 4 that provide a dynamic seal with the liner 2 that guides it.
  • the body 1 is provided with two flanges 6 and 7 at its plane and opposite ends, that are fixed to the body 1 by screws 8 ; mating flanges 9 and 10 are associated with the corresponding flanges 6 and 7 being connected to them by attachment screws 11 and other adjustment screws 5 ( FIG. 2 ).
  • the adjustment screws 5 are threaded in the flanges 6 and 7 and define the distance from the mating flanges 9 and 10 by coming into contact with them; the attachment screws 11 are threaded in the mating flanges 9 and 10 and hold this distance at a fixed value.
  • the periphery of the body 1 between the plane faces from which the flanges 6 and 7 are made comprises two circular ribs 12 and 13 made facing the mating flanges 9 and 10 and a recess 14 separates the ribs 12 and 13 , and communicates with the liner 2 through feed flow streams 15 .
  • a special flow stream 16 leads to a pressure sensor 17 made under the body 1 .
  • the machine also comprises an annular shaped elastic bladder 18 arranged around the central body 1 . Its ends are held in place between the ribs 12 and 13 and the mating flanges 9 and 10 with small clearances along the direction of the radius of the body 1 . Seals 19 and 20 are compressed between the body 1 , the bladder 18 and the flanges 6 and 7 beyond the ribs 12 and 13 .
  • a tube 21 is arranged around the bladder 18 between the flanges 6 and 7 .
  • Liquid is poured into the liner 2 , the device is placed between opposite plates 22 and 23 of a tensile and compression testing machine that is not shown in more detail, and the plates 22 and 23 are brought towards each other by applying a determined force on the piston 3 and the flange 7 furthest away from the piston, respectively.
  • the piston 3 is free to move along the axis of the tube 21 and the body 1 , and passes through the other flange 6 . One of them bears on the piston 3 and the other supports the body 1 .
  • the compression force increases the pressure of the liquid in the liner 2 and in the recess 14 by means of the communication provided by the flow streams 15 .
  • the result is expansion of the bladder 18 at uniform pressure, and the elasticity of the bladder 18 is such that the pressure is uniformly transmitted to the tube 21 .
  • Liquid leaks outside the recess 14 are stopped by seals 19 and 20 located behind the internal face of the bladder 18 .
  • FIG. 2 shows a construction detail. Axial shrinkage of the tube 21 may show up axial clearance between the tube and the mating flanges 9 and 10 , which can facilitate extrusion of the bladder 18 . It is then proposed to release the attachment screws 11 and then to adjust the adjustment screws 5 to push the mating flanges 9 and 10 back slightly until they come into contact with the tube 21 , but without applying any axial force on it.
  • the invention was used to test 100 mm diameter and 200 mm high tubes at pressures of up to 200 bars.
  • one tube 21 had been tested, it was replaced by another tube, moving the plates 22 and 23 of the machine apart, disassembling the screws 8 to remove the flanges 6 and 7 and then performing the operations in the reverse order. This is done very quickly.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
US12/993,921 2008-08-08 2009-08-06 Test machine to apply a uniform internal pressure to a tube Expired - Fee Related US8353217B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0855495A FR2934899B1 (fr) 2008-08-08 2008-08-08 Machine d'essai pour appliquer une pression interne uniforme a un tube
FR0855495 2008-08-08
PCT/EP2009/060210 WO2010015677A1 (fr) 2008-08-08 2009-08-06 Machine d'essai pour appliquer une pression interne uniforme a un tube

Publications (2)

Publication Number Publication Date
US20110259087A1 US20110259087A1 (en) 2011-10-27
US8353217B2 true US8353217B2 (en) 2013-01-15

Family

ID=40647702

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/993,921 Expired - Fee Related US8353217B2 (en) 2008-08-08 2009-08-06 Test machine to apply a uniform internal pressure to a tube

Country Status (9)

Country Link
US (1) US8353217B2 (fr)
EP (1) EP2313757B1 (fr)
JP (1) JP5409787B2 (fr)
KR (1) KR101721704B1 (fr)
CN (1) CN102112858B (fr)
AT (1) ATE542124T1 (fr)
CA (1) CA2731986C (fr)
FR (1) FR2934899B1 (fr)
WO (1) WO2010015677A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10024772B1 (en) * 2015-05-19 2018-07-17 The United States Of America, As Represented By The Secretary Of The Navy Device and method for applying internal pressure to a hollow cylinder

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2964741B1 (fr) * 2010-09-14 2012-10-12 Commissariat Energie Atomique Dispositif de test en fluage d'un echantillon tubulaire
CN102854065B (zh) * 2011-06-29 2015-03-11 海洋王照明科技股份有限公司 静水压试验机
JP2014077719A (ja) * 2012-10-11 2014-05-01 Yokoshima & Co 管内耐圧試験機及び試験方法
FR3019296B1 (fr) * 2014-03-27 2018-06-01 Commissariat A L'energie Atomique Et Aux Energies Alternatives Machine d'essai pour appliquer une pression interne a un tube de petit diametre
KR102206177B1 (ko) * 2014-07-01 2021-01-22 엘지전자 주식회사 압축기 및 압축기의 조립 방법
CN105067506B (zh) * 2015-08-18 2018-07-10 北京苏试创博环境可靠性技术有限公司 一种基于金属板材的耐湿热性能自动检测装置
CO2017006274A1 (es) * 2017-06-23 2018-12-28 Fundacion Univ Del Norte Máquina de pruebas de propiedades mecánicas
CN108225754B (zh) * 2017-12-28 2024-04-26 贵州高峰石油机械股份有限公司 一种用于校核石油井下工具拉压试验架精度的测试装置
CN113324847A (zh) * 2021-06-09 2021-08-31 上海飞研检测技术有限公司 一种橡胶圈力学性能检测装置
CN115683886B (zh) * 2022-12-30 2023-03-17 四川鑫跃鑫科学仪器有限公司 压力容器检测装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3044289A (en) * 1959-09-29 1962-07-17 Texaco Experiment Inc Pressure fluid ram
US3628378A (en) * 1970-02-16 1971-12-21 Us Navy Pneumatic portable dynamometer
FR2087758A5 (fr) 1970-05-29 1971-12-31 Commissariat Energie Atomique
GB1478418A (en) 1976-01-30 1977-06-29 Turret Eng Ltd Load applaying and measuring piston assembly for use with a triaxial load cell
WO2001033194A1 (fr) 1999-11-04 2001-05-10 Laboratoire Central Des Ponts Et Chaussees Procede et dispositif d'essai triaxial in situ
US20010037687A1 (en) 2000-02-25 2001-11-08 Brovold Thomas E. Compact hollow cylinder tensile tester

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Publication number Priority date Publication date Assignee Title
CN86209296U (zh) * 1986-11-26 1987-10-28 兰州石油机械研究所 一种高内压疲劳源装置
JPH01107952U (fr) * 1988-01-14 1989-07-20
CN2150552Y (zh) * 1993-04-08 1993-12-22 化学工业部北京化工研究院 塑料管材内压蠕变试验装置
JP2000214060A (ja) * 1999-01-22 2000-08-04 Mitsubishi Rayon Co Ltd 円筒体の引張り試験装置
JP4067704B2 (ja) * 1999-06-25 2008-03-26 本田技研工業株式会社 歪測定装置
NO316103B1 (no) 1999-11-12 2003-12-15 Rolf Barman Fremgangsmåte og anordning til fremstilling av tannbörste, tannbörste, samtanvendelse av fremgangsmåten og anordningen
JP2001242054A (ja) * 2000-02-25 2001-09-07 Ngk Insulators Ltd 圧縮試験機
CN2456152Y (zh) * 2000-12-27 2001-10-24 郑州大学 大直径压力管道试压装置
JP2004286586A (ja) * 2003-03-20 2004-10-14 Sumitomo Metal Ind Ltd 高圧気体疲労試験方法及び装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3044289A (en) * 1959-09-29 1962-07-17 Texaco Experiment Inc Pressure fluid ram
US3628378A (en) * 1970-02-16 1971-12-21 Us Navy Pneumatic portable dynamometer
FR2087758A5 (fr) 1970-05-29 1971-12-31 Commissariat Energie Atomique
US3803365A (en) 1970-05-29 1974-04-09 Commissariat Energie Atomique Creep cell,in particular for nuclear reactors
GB1478418A (en) 1976-01-30 1977-06-29 Turret Eng Ltd Load applaying and measuring piston assembly for use with a triaxial load cell
WO2001033194A1 (fr) 1999-11-04 2001-05-10 Laboratoire Central Des Ponts Et Chaussees Procede et dispositif d'essai triaxial in situ
US20010037687A1 (en) 2000-02-25 2001-11-08 Brovold Thomas E. Compact hollow cylinder tensile tester

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
International Search Report for PCT/EP2009/060210.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10024772B1 (en) * 2015-05-19 2018-07-17 The United States Of America, As Represented By The Secretary Of The Navy Device and method for applying internal pressure to a hollow cylinder

Also Published As

Publication number Publication date
EP2313757A1 (fr) 2011-04-27
JP5409787B2 (ja) 2014-02-05
KR101721704B1 (ko) 2017-03-30
FR2934899A1 (fr) 2010-02-12
CA2731986C (fr) 2017-02-21
CN102112858A (zh) 2011-06-29
ATE542124T1 (de) 2012-02-15
CA2731986A1 (fr) 2010-02-11
CN102112858B (zh) 2012-11-14
WO2010015677A1 (fr) 2010-02-11
EP2313757B1 (fr) 2012-01-18
KR20110055536A (ko) 2011-05-25
FR2934899B1 (fr) 2010-09-17
US20110259087A1 (en) 2011-10-27
JP2011530694A (ja) 2011-12-22

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